﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Phone.Interface
{
    public abstract class BasePhone
    {
        public int Price { get; set; }
        public int Size { get; set; }

        public void Call()
        {
            Console.WriteLine("这是 Call");
        }


        public void Message()
        {
            Console.WriteLine("这是 Message");
        }

        public abstract void System();

    }
}
